Rubbing device for use on textile machines

ABSTRACT

A RUBBING DEVICE FOR USE ON TEXTILE MACHINES HAVING AT LEAST TWO SUCCESSIVE PAIRS OF RUBBING MEMBERS DISPOSED IN SERIES ONE AFTER THE OTHER IN THE PATH OF A ROVING OF TEXTILE FIBRES THROUGH A PREPARATORY OR A SPINNING MACHINE, EACH PAIR COMPRISING AN UPPER AND A LOWER RUBBING MEMBER HAVING TRANSVERSE MOTIONS AT OPPOSITE ANGLES TO SAID PATH OF SAID ROVING.

Jan. 26,1971 J. F. HERUBEL RUBBING DEVICE FOR USE ON TEXTILE MACHINES Filed Aug. 21, 1968 IN TOR an FRENE HEKlLBEL United States Patent Int.'Cl. D01 /58 US. 01119 -153 2 Claims ABSTRACT 'OETHE- DISCLOSURE A rubbing device for use on textile machines having at least two successive pairs. of rub'bingrnerribers disposed in series one after the other'in the path of a roving of textile fibres through a preparatory or a spinning machine, each pair comprising an upper and a lower rubbing member having transverse motions at opposite angles to said path of said roving.

The invention concerns a novel device for rubbing textile rovings comprising a plurality of operating sets or pairs of rubbing members which are capable of replacing known rubbingdevices in preparation and spinning machines as, for example, in preparatory machinery for a woolen spinning system.

It is known that despite the natural felting property of wool fibres, the cohesion between them decreases when the rovingbecomes too fine. -In order to increase this cohesion the roving is subjected to rubbing which consists of twisting the roving in one direction then untwisting it in the opposite direction to the same extent. This operation causes a slight felting of the fibres, thus increasing the cohesion of the roving.

One known rubbing device comprises a pair of rotating rubbing leathers or aprons between which the roving passes, and which have at the same time an advancing movement; ,in the direction of movement of the roving and a lateral reciprocating motion transversely of the roving.

This device gives very good results for moderate speeds but it is not so useful in more rapid machines. As a matter of fact, the drive means for the lateral reciprocating motion has to work under such conditions that it is difficult to guarantee satisfactory length of life for the members. In addition, the rubbing effect on the roving is not uniform.

It has already been proposed, to obviate the alternating control of the aprons, to provide various devices constituted essentially of two surfaces between which the roving passes and isrolled as is described for example in German patent specification No. 46,213.

These rubbing devices have nevertheless certain drawbacks. The roving is caused, by the components correspouding to the two working surfaces, to turn on itself. The felting consequently occurs unilaterally and always under the action of components actingin the same direction. It will be readily understood that the felting of the fibres is greatly diminished and consequently the cohesion of the roving is greatly decreased.

An object of the present invention is to provide a rubbing device which avoids the aforementioned disadvantages and which permits subjecting the roving to two or more successive rubbings thus increasing the cohesion of the fibres to a maximum.

For this purpose a rubbing device according to the invention comprises at least two pairs of rubbing members disposed one after the other in the path of roving, each ice of the pairs of rubbing members comprising an upper rubbing member and a lower rubbing member having travelling motions the axes of which are at opposite angles to the path of the roving.

The friction members are preferably rubbing aprons.

The angles of the axes of the transverse motions of the upper and lower rubbing members of one and same of said members to the path of the roving are preferably equal and opposed, but may be unequal.

The angles of the corresponding rubbing members in two successive pairs of rubbing members may be opposed.

A preferred embodiment of a rubbing device according to the invention will now be described by way of example with reference to the accompanying drawings in which:

FIG. 1 is a view in elevation of the rubbing device; and

FIG. 2 is a plan view of the device shown in FIG, 1.

In FIGS. 1 and 2 a roving 1 of textile fibres is delivered by twin drawing rollers 2 and 3, and a rubber sheathed pressure roller 4, and passes between two rubbing elements 5 and 6.

Each element comprises an upper rubbing apron 7 and a lower rubbing apron 8 mounted under slight tension about terminal bosses 9 and 10, 9 and 10', which are supported on shafts 12 and 13, 12' and 13' the axes of rotation of which are at an acute angle to the path of the roving 1. These shafts are mounted in fixed bearings shown diagrammatically at 15, 16, 17, 18 and 15', 16, 17, 18, note FIG. 2, and are integral with the frame of the machine (not shown).

The upper rubbing apron 7 and the lower rubbing apron 8 are disposed so as to form an angle, the bisector of which corresponds substantially to the path of the roving 1.

The speed of endless motion of the rubbing apron is such that the speed of the advance movement of the roving between them is substantially equal to the speed at which it is delivered by the drawing rollers.

The bearings 15, 16, 17, 18 are adjustable in height on their support to permit regulation of the distance apart of the two rubbing aprons according to the degree of rubbing effect required.

In a modified form (not illustrated) the lower apron is supported by a table or an auxiliary roller placed between the lower bosses 9 and 10'. A pressure roller may be mounted between the upper bosses 9 and 10 in order to press the upper rubbing apron against the lower rub bing apron.

In the device shown by way of example, the shafts 13 and 13' are driven through universal joints 19 and 20 from shafts 21 and 22 coupled through gearing to a motor (not shown).

A device according to the invention has numerous advantages compared with known rubbing devices and in particular the following:

(a) The rubbing members are not driven in an oscillatory movement and are composed of two or more simple successive elements with crossed rubbing aprons;

(b) The frictional action of the two successive rubbing elements is contrary so as to obtain a better cohesion of the fibres in the roving;

(c) The roving delivered does not have a true twist which would be detrimental to the drafting of the roving on spinning frames;

(d) The rubbing is uniform over the whole length of the roving;

(e) The omission of the conventional drive means for the reciprocating motion of the two rubbing aprons permits an increased working speed for the machine;

(f) The distance apart of the friction faces of the rubbing aprons is adjustable;

I (g) The device permits rubbing of one or more rovings at the same time; and

(h) The angle formed by the two friction aprons of one pair may be different according to the desired degree of rubbing effect.

The embodiment described above and shown in the drawing is given by way of example only and it is obvious that the form, nature, disposition and mounting of its components may be modified in any suitable manner without departing from the scope of the invention. Thus the number of pairs of rubbing members disposed in series may differ according to the intended application and the material treated. The driving of the rubbing aprons may be carried out in any suitable manner. On the other hand the angles may be different from one pair of rubbing aprons to the next.

What I claim is:

1. A device for rubbing textile fibres in a roving for increasing the cohesion of the fibres, comprises means for delivering a roving along a longitudinal path of travel, at least two pairs of moving endless rubbing members spaced in series one after the other in the path of travel of the roving, each said pair of rubbing members comprising an endless upper rubbing member and an oppositely disposed endless lower rubbing member arranged to afford a rubbing effect on the roving as it passes therebetween, means for imparting continuous traveling motion to said upper and lower rubbing members as the roving passes therebetween with the axis of the direction of the traveling motion of said upper and lower rubbing members arranged at opposite acute angles to the axis to the path of travel of the roving, means mounting said rubbing members of the first of said pairs of rubbing members for advancement in the general direction of the travel of the roving so that a continuous rubbing action is imparted to the roving in a direction angularly dis- 4 g V posed to the axis of the roving, the opposite acute angles of said rubbing members in said first pair of rubbing members relative to the axis of the roving are equal, and means mounting the second pair of said pairs of rubbing members so that the direction of traveling motion of the upper rubbing member is opposite relative to the path of travel of the roving and in an opposite angular direction to that of the upper rubbing member of the first pair of rubbing members and the direction of traveling motion of said lower rubbing member is opposite relative to the path of travel of the roving and in an opposite angular direction to that of the lower rubbing member of the first pair of rubbing members so that a reversal in the direction of the rubbing action exerted on the roving is effected as the roving passes through two adjacent serially arranged pairs of said rubbing members.

2. The device according to claim 1 wherein said upper and lower rubbing members are rubbing aprons.

References Cited 7 OTHER REFERENCES Japanese Patent Publication No. 179/62, published Jan. 20, 1962, 19 l53. I DORSEY NEWTON, Primary Examiner 

